JPH051449U - Dishwasher - Google Patents

Abstract

(57) [Summary] [Purpose] To easily clean the inside of the cleaning tank. [Structure] The washing tank 2 includes a washing step (steps 502 to 504) including water supply, washing and drainage, and a rinsing step (steps 505 to 507) including water supply, washing and drainage.
A course for cleaning is provided so that it can be selected. The rinsing step may include washing with hot water.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a dishwasher.

[0002]

[Prior art]

  Dishwasher wash, rinse and dry at preset times or times By sequentially advancing each of the steps, the dishes stored in the washing tank can be washed. Of.

[0003]

[Problems to be solved by the device]

  However, conventional dishwashers can be used for a long time when first used after purchase. If it is not used, the cleaning tank must be manually cleaned. It was annoying. Even if you drive without tableware, the preset time Since each process is executed depending on the number of times, there is a problem that it takes much time.   The present invention aims to solve such problems, and automatically clears the inside of the cleaning tank. An object is to provide a dishwasher that can be turned on.

[0004]

[Means for Solving the Problems]

  In order to achieve the above-mentioned object, the present invention is to wash and wash at a preset time or number of times. In a dishwasher that controls each process of rinsing and drying, water supply, washing and Cleaning tank consisting of drainage and rinse process consisting of water supply, washing and drainage The cleaning course is provided so that it can be selected. In the rinsing step Cleaning with hot water may be included.

[0005]

【Example】

  Next, an embodiment of the present invention will be described with reference to the drawings.   FIG. 1 shows a dishwasher for carrying out the method according to the invention. Wash inside the exterior body 1 The cleaning tank 2 is housed, and the exterior body 1 and the cleaning tank 2 can be opened by a front door (not shown). It has become Noh. A dish basket 3 is stored inside the washing tank 1, and the standard solution is stored inside the bottom. The heater 4 is arranged so as to be immersed in the surface NL. Also, the bottom of the cleaning tank 2 is water. A reservoir 5 is formed, and a suction pipe 7 of a cleaning pump 6 and a drainage pump are formed in the water reservoir 5. 8 and a suction pipe 9 are attached. The washing pump 6 and the drainage pump 8 are respectively It is driven by motors 10 and 11.

[0006]   The discharge pipe 12 of the cleaning pump 6 penetrates from the bottom of the cleaning tank 2 to the inside thereof, and has a first end at its tip. The injection nozzle 13 is rotatably attached. In addition, from the middle of the discharge pipe 12 The branched pipe 14 stands up at the rear part of the cleaning tank 2 and has a second injection nozzle at its tip. 15 is rotatably attached. First jet nozzle 13 and second jet nozzle The ruler 15 has a hollow rod shape, and is made by the cleaning water ejected from the ejection holes arranged in the longitudinal direction. It is designed to rotate by itself. The discharge pipe 16 of the drainage pump 8 is located after the cleaning tank 2. It is installed on the back, and once it has been raised, it is lowered and the tip is the exterior body. It is opened to the outside of 1 and serves as a drainage pipe connection port.

[0007]   From the vicinity of the drain pipe connection port of the discharge pipe 16 through the rear rear surface of the cleaning tank 2 to the inside An open water supply pipe 17 is erected, and a solenoid 19 opens the water supply pipe 17. A water supply valve 18 that is closed is provided. A fan motor is installed above the inside of the cleaning tank 2. A fan 20 is provided which is driven to rotate by 21. In addition, in the cleaning tank 2 The part is provided with a float type water level detection switch 23 for detecting the water level of washing water. A temperature sensor 22 is provided on the outer surface of the bottom.

[0008]   An operation panel 24 as shown in FIG. 2 is provided on the front surface of the exterior body 1. this The operation panel 24 is fully automatic, low temperature fully automatic, prewash, rinse dry, dry and care. Keys K1 to K6 to start each course, pause and restart And a key K7 for performing the operation. It also lights up when keys K1 to K6 are turned on. 6 LEDs L1 to L6 and each process of washing, rinsing and drying of each course Shows the three LEDs L7 to L9 that light up during the row and the remaining time until the end of each course The segment LEDL10 shown is provided.

[0009]   The key K1 for the fully automatic course and the key K2 for the low temperature fully automatic course can be operated once. Is a standard course where standard cleaning time is set, but operate twice consecutively This makes it possible to select a careful course with a long cleaning time. At this time, L1 , L2 changes from red to green.   The remaining time displayed by the segment LED L10 will be described later. In the fully automatic course and the low temperature fully automatic course, fuzzy inference performed at the time of cleaning is used. After the washing conditions such as the number of rinses and the drying time are set according to the amount of dishes, the required time is displayed. However, due to fluctuations in water supply time due to water pressure, outside air temperature, water temperature, and voltage fluctuations As a result of fluctuations in the heating power of the heater, fluctuations in the time required for hot water rinsing, etc. If the tentative remaining time that is supposed to be calculated is sequentially subtracted as it is, the end time does not match . Therefore, the remaining time is corrected during each process of washing, rinsing, and drying, and the correct remaining time The space is displayed.

[0010]   This dishwasher is provided with a control device equipped with a microphone computer. This controller will wash, rinse and dry the course selected with keys K1-K6. The steps are sequentially executed. The flowcharts of FIGS. 2 to 9 are as follows. The operation of the process of each course will be described below. 1) Fully automatic and low temperature fully automatic   As shown in Fig. 3, this course includes initial drainage, washing, hot water rinsing and drying. Automatically. Low temperature fully automatic is for cleaning tableware that is sensitive to heat such as plastic tableware. It is a course, the cleaning time at the time of cleaning, the control temperature of the cleaning water, the drying temperature and the drying time Except for the difference, the process is exactly the same as the fully automatic process. In this course, cold water rinsing frequency And the drying time is based on the tableware amount determined by the tableware amount determination performed at the time of washing. Automatically set and adjusted.

[0011] Initial drainage   In the initial drainage of step 101 shown in FIG. 3, the drainage pump motor 11 is operated for 10 seconds. The cleaning water that has been driven and remains in the water reservoir 5 of the cleaning tank 2 and the suction pipes 7 and 9 is drained. It is drained by the pump 8. Here, there is water up to the normal water level NL, and the water level switch When 23 is off, 50 seconds of normal drainage is done. wash   In the washing process, first, at step 102, the solenoid 19 is turned on to turn on the water supply valve 18. Is opened, and water is supplied into the cleaning tank 2 through the water supply pipe 17. This water supply has a water level When the normal water level NL is reached and the water level detection switch 23 is turned off, the process ends.

[0012]   Next, in step 103, the heater 4 is energized and the cleaning pump motor 10 is turned on. Is activated. It should be noted that when the wash water reaches 60 ° C (50 ° C for low temperature full automatic), it will automatically Is temperature controlled. As a result, the cleaning water in the water reservoir 5 is sucked by the cleaning pump 6. And is sprayed from the first and second spray nozzles 13 and 15 toward the tableware to clean the tableware. Are washed away. The washing water sprayed toward the tableware flows down to the water reservoir 5 and circulates. It is looped.   This cleaning takes 9 minutes on the standard course after the temperature sensor 22 detects 40 ° C. The entrance course will end in 14 minutes.

[0013]   During this cleaning, the temperature will be described later while the water temperature rises from 40 ° C to 50 ° C. The amount of tableware stored in the cleaning tank 2 is determined, and Is set.   Subsequently, in step 104, the drainage pump motor 11 is started for 50 seconds to clean the dirty washing machine. Clean water is drained. In addition, this drainage is paused for 3 seconds after 30 seconds and put into the pump. It is designed to prevent the inhalation of air.

[0014]Distinction of tableware   As described above, in the dish amount determination performed during washing in step 103, As shown, first, in step 1001, until the water temperature rises from 40 ° C to 50 ° C, The current to the heater 4 is detected by the current sensor, and the duty control is performed in a cycle of 30 seconds. Controlled. As a result, the constant power 102 lower than the power consumption of the heater 1200 W Since it is controlled to 0 W, there is no fluctuation in power and accurate temperature rise rate can be measured. Be done.   Next, in step 1002, before the water supply in step 102 shown in FIG. Of the initial cleaning temperature Y detected by the temperature sensor 22 and stored in the control device. Get caught. Then, in step 1003, the temperature of the washing water is changed from 40 ° C. to 50 ° C. during washing. The timer measures the temperature rise time X that indicates the temperature rise rate until the temperature rises to ℃ . Note that instead of showing the temperature rise rate with this temperature rise time, the temperature rise after a certain time May be represented by.   Then, in step 1004, the temperature rise time X and the initial cleaning temperature Y are input. Then, the amount Z of dishes stored in the washing tank 2 is output by fuzzy reasoning.

[0015]   In this fuzzy reasoning, as shown in FIG. 10 to FIG. Members corresponding to fuzzy sets of time, initial temperature of washing, and amount of dishes The ship function is defined.   That is, as shown in FIG. 10, the temperature rise time is extremely short (E), short (S), medium. (M) and length (L) are divided into four stages, and each membership function has a triangular shape. Shown in function. The initial cleaning temperature is low (L), as shown in FIG. Divided into 3 stages of middle (M) and high (H), each membership function is triangular Is shown in the function. Similarly, as shown in FIG. 12, the tableware amount is 0 person, 1 person. It is divided into 6 levels, such as 5 minutes for 5 minutes, and each membership function has 3 It is shown as a function of angles.

[0016]   Fuzzy rules shown in Table 1 are established between each membership function. There is. For example, in rule 4, if the temperature rise time is S and the initial washing temperature is L, the tableware The amount is for one person, and in rule 6, even if the temperature rise time is S, the initial cleaning temperature is If it is H, it will be for 4 people. As shown in Table 2, even if the amount of dishes is the same, the temperature Considering that the rise time changes depending on the initial temperature of cleaning, that is, the temperature inside the chamber, Of.                             Table 1     Rule Temperature rise time X Initial washing temperature Y Tableware amount Z       1 E L 0       2 E M 0       3 E H 3       4 SL 1       5 S M 2       6 SH 4       7 M L 3       8 M M 4       9 MH 5     10 L L 4     11 LM 5     12 L H 5

[0017]                             Table 2       Tableware amount Z Temperature rise time X Initial washing temperature Y         0 EL         0 E M         1 SL         2 S M         3 E H         3 M L         4 SH         4 mm         4 L L         5 MH         5 LM         5 L H

[0018]   Thus, under the defined membership function and fuzzy rules, FIG. First, in step 1101, the temperature with respect to the input value X of the temperature rise time is The degrees XE, XS, XM, and XL of the rising times E, S, M, and L are calculated. Next, in step 1102, the initial cleaning temperatures L and M for the input value Y of the initial cleaning temperature are set. , H respectively YL, YM. YH is calculated. Then, step 1103. , The degree of temperature rise time and the degree of initial cleaning temperature for each fuzzy rule The smaller value Zf is taken, and the membership of the tableware amount corresponding to this value of Zf The function is truncated and the fuzzy output is calculated. After this, in step 1104, The sum of the area of the membership function of the tableware amount from 0 to 5 people who have been truncated The center of gravity position G from the reference point is calculated, and the amount of tableware corresponding to this center of gravity position G is calculated. As a result, a defuzzified output value Z is output.

[0019]   Next, based on the tableware amount Z output by this fuzzy inference, the steps of FIG. At 1005, cleaning conditions for the subsequent process are set. Here, the condition to be set is As shown in FIG. 13, it is the cold water rinsing frequency and the drying time. It is set according to the quantity. In addition, the cleaning time of this washing process is also decided at this time. You may do it.

The determination of the amount of dishes and the setting of the washing condition by the above fuzzy inference will be described more specifically. As shown in FIGS. 14 and 15, it is assumed that the temperature rise time is X ₁ between 330 seconds and 360 seconds and the initial cleaning temperature is Y ₁ between 10 ° C. and 20 ° C. First, from the membership function of the temperature rise time, XE = XL = 0, XS = 0.7, and XM = 0.3 are obtained. Further, from the membership function of the initial temperature of cleaning, YL = 0. 2, YM = 0.8 and YH = 0 are obtained.

Next, according to the fuzzy rules of Table 1, as a degree of each amount of tableware, one for rule 4 is 0.2, two for rule 5 is 0.7, and three for rule 7 is 0. 2, rule 8 gives 0.3 for 4 and all other rules get 0. Then, as shown in FIG. 16, the membership function of the tableware amount is truncated at each of these amounts, and a trapezoidal fuzzy output is obtained. The dish quantity Z ₁ corresponding to the position of the center of gravity G 1 of the area sum of this fuzzy output is obtained as a defuzzified output value. Based on the tableware amount Z ₁ , as shown in FIG. 13, the number of cold water rinses is set to 3 and the drying time is set to 12 minutes in the standard course and 17 minutes in the low temperature course.

[0022] Cold water rinse   After the above washing process is completed, as shown in steps 105 to 107 of FIG. The cold water rinsing process consisting of water supply, cleaning and drainage is based on the fuzzy reasoning. The number of times set based on. In the cleaning of step 105, the heater 4 The heating is not performed, but the cold water supplied is performed for 1 minute. Step 105 The water supply and the drainage in step 107 are the same as those in the washing process. Hot water rinse   In the boiling water rinsing process, water is first supplied in step 108, and then water is supplied in step 109. When the water 4 is energized and the cleaning pump 6 is driven, the water temperature becomes 70 ° C (low temperature). Rinse with hot water is performed until the temperature reaches 50 ° C in the fully automatic process. Is drained.

[0023] Dry   In the drying process, first, when the duty of the heater 4 is controlled in step 111, At the same time, the fan motor 21 is activated to dry with warm air. This drying time Is performed for the time set in the washing process based on the amount of tableware by fuzzy reasoning Be done. The warm air temperature is controlled to 70 ° C (50 ° C in low temperature full automatic).   Next, in step 112, only the fan motor 22 is started, and drying by cold air is performed. It is performed for 5 minutes (3 minutes in low temperature full automatic), and the power is cut off in step 113. The fully automatic course (low temperature fully automatic course) ends.

[0024] 2) Prewash   In this prewashing course, as shown in FIG. 4, initial drainage is performed in step 201, Two cold water rinses consisting of water supply, cleaning and drainage were performed in steps 202-204. It This course is for the first meal of the child if the child and the parent have two dinners at home. Pre-wash the dishes afterwards to make it easier to remove the stains, and then wash the dishes collectively after the parents eat. Useful to do. 3) Rinse and dry   This rinse-drying course removes dust and dirt from dishes that have not been used for a long time. As shown in FIG. 5, initial drainage is performed in step 301. Then, in steps 302 to 304, cold water rinsing consisting of water supply, washing and drainage Is performed once, and hot water rinsing consisting of water supply, washing and drainage is performed in steps 305 to 307. It is performed once, and drying with warm air and cold air is performed in steps 308 and 309.

[0025] 4) Dry   This drying course is used to dry hand-washed dishes. As shown in FIG. 6, after the initial drainage is performed in step 401, steps 402, 4 At 03, drying with warm air and cold air is performed. 5) Care   This cleaning course will help you clean your dishwasher if it hasn't been used for a long time. It is performed for the purpose of smelling and smelling inside. As shown in FIG. After initial drainage is performed in step 501, water is supplied and washed in steps 502-504. Washing consisting of drainage is performed, and in steps 505 to 507, water supply, washing and drainage are performed. One cold water rinse consisting of water is performed. In the washing in the washing process of step 503, The water temperature is controlled to 60 ° C., and the process ends in a predetermined time (15 minutes).

[0026]   With this maintenance course, it is not necessary to manually clean the inside of the cleaning tank 2. And is easy to maintain. In addition, wash-rinse with hot water, or wash-rinse with cold water Rinsing-rinsing with hot water may be performed in this order. In this case, the hot water soot in the final process This has the advantage that the cleaning tank 2 dries faster with residual heat.

[0027]

[Effect of device]

  As is clear from the above description, according to the present invention, the cleaning and rinsing You can select the course you want to train, so if you use it for the first time after purchase or for a long time This course makes it easy to clean the inside of the washing tank when not in use. It is possible and easy to maintain. Particularly, according to the invention of claim 2, a hot water rinse is performed. After that, there is an effect that the cleaning tank is dried more quickly due to the residual heat.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a dishwasher.

FIG. 2 is a front view of an operation panel.

FIG. 3 is a flowchart of a fully automatic or low temperature fully automatic course.

FIG. 4 is a flowchart of a pre-washing course.

FIG. 5 is a flow chart of a rinse and dry course.

FIG. 6 is a flowchart of a drying course.

FIG. 7 is a flowchart of a maintenance course.

FIG. 8 is a flowchart of a tableware amount determination routine.

FIG. 9 is a flowchart of a tableware amount fuzzy inference routine.

FIG. 10 is a diagram showing a membership function of temperature rise time.

FIG. 11 is a diagram showing a membership function of a cleaning initial temperature.

FIG. 12 is a diagram showing a membership function of the amount of tableware.

FIG. 13 is a diagram for determining washing conditions based on the amount of dishes.

FIG. 14 is a diagram showing specific values of a membership function with respect to a certain value X ₁ of temperature rise time.

FIG. 15 is a diagram showing specific values of the membership function for a certain value Y ₁ of the initial cleaning temperature.

FIG. 16 is a diagram showing a fuzzy output of the tableware amount with respect to specific values of the membership function of FIGS. 14 and 15.

[Explanation of symbols]

2 ... Cleaning tank, 22 ... Temperature sensor.

Claims (2)

[Scope of utility model registration request] 1. A dishwasher in which each process of washing, rinsing, and drying is controlled at a preset time or number of times, and a washing process including water supply, washing, and drainage, and water supply, washing, and drainage A dishwasher characterized in that a course for cleaning the washing tank can be selected in the rinsing step. 2. The dishwasher of claim 1, wherein the rinsing step includes washing with hot water.